Analysis of interatomic Contacts of Structural Units in PDB entry:
4A3S


Contacts of Structural Units (CSU) are derived with the CSU software (Sobolev V., Sorokine A., Prilusky J., Abola E.E. and Edelman M. (1999) Automated analysis of interatomic contacts in proteins. Bioinformatics, 15, 327-332).
For CSU analysis of other PDB entry

This page provides analyses of contacts formed by:
For analysis of ligand-protein contacts, use: 3D structure can be seen in additional window with STING software for 4A3S entry

There are 2 chains in PDB entry 4A3S (CSU analysis of residue contacts immediately below table)
Chain ID Initial residueTerminal residue
A
 MET 1ILE 319
B
 MET 1ILE 319
Residue contacts

1. List of contacts for up to 10 consecutive residues:
Chain ID from residue number to residue number


2. Detailed analyses of contacts for any single residue:
Residue number chain ID
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There are 28 helices in PDB entry 4A3S. Click on helix of interest for CSU analysis.
Helix
number 		Helix
ID		Chain
ID		 Initial
residue		Terminal
residue		 Helix class
Helix 1
1
A
15 30Right-handed alpha
Helix 2
2
A
41 47Right-handed alpha
Helix 3
3
A
53 58Right-handed 310
Helix 4
4
A
73 78Right-handed alpha
Helix 5
5
A
78 92Right-handed alpha
Helix 6
6
A
104 115Right-handed alpha
Helix 7
7
A
139 161Right-handed alpha
Helix 8
8
A
174 185Right-handed alpha
Helix 9
9
A
197 210Right-handed alpha
Helix 10
10
A
226 239Right-handed alpha
Helix 11
11
A
248 253Right-handed 310
Helix 12
12
A
257 276Right-handed alpha
Helix 13
13
A
296 300Right-handed alpha
Helix 14
14
A
307 319Right-handed alpha
Helix 15
15
B
15 30Right-handed alpha
Helix 16
16
B
41 47Right-handed alpha
Helix 17
17
B
53 58Right-handed 310
Helix 18
18
B
73 78Right-handed alpha
Helix 19
19
B
78 92Right-handed alpha
Helix 20
20
B
104 115Right-handed alpha
Helix 21
21
B
139 161Right-handed alpha
Helix 22
22
B
174 184Right-handed alpha
Helix 23
23
B
197 210Right-handed alpha
Helix 24
24
B
226 239Right-handed alpha
Helix 25
25
B
248 253Right-handed 310
Helix 26
26
B
257 276Right-handed alpha
Helix 27
27
B
297 300Right-handed 310
Helix 28
28
B
307 317Right-handed alpha
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There are 8 sheets in PDB entry 4A3S. Click on sheet of interest to get list of strands forming it: AA, AB, AC, AD, BA, BB, BC, BD,

There are 6 strands in AA sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
A
49 52first strand
Strand 2
A
33 37anti-parallel
Strand 3
A
3 9parallel
Strand 4
A
96 101parallel
Strand 5
A
119 125parallel
Strand 6
A
137 138parallel
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There are 7 strands in AB sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
A
49 52first strand
Strand 2
A
33 37anti-parallel
Strand 3
A
3 9parallel
Strand 4
A
96 101parallel
Strand 5
A
119 125parallel
Strand 6
A
282 287parallel
Strand 7
A
290 295anti-parallel
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There are 2 strands in AC sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
A
137 138first strand
Strand 2
A
119 125parallel
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There are 4 strands in AD sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
A
188 190first strand
Strand 2
A
216 221parallel
Strand 3
A
163 168parallel
Strand 4
A
242 246parallel
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There are 6 strands in BA sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
B
49 51first strand
Strand 2
B
33 37anti-parallel
Strand 3
B
3 9parallel
Strand 4
B
96 101parallel
Strand 5
B
119 125parallel
Strand 6
B
137 138parallel
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There are 7 strands in BB sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
B
49 51first strand
Strand 2
B
33 37anti-parallel
Strand 3
B
3 9parallel
Strand 4
B
96 101parallel
Strand 5
B
119 125parallel
Strand 6
B
282 287parallel
Strand 7
B
290 295anti-parallel
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There are 2 strands in BC sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
B
137 138first strand
Strand 2
B
119 125parallel
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There are 4 strands in BD sheet. Click on strand of interest for CSU analysis.
Strand
number 		Chain
ID		 Initial
residue		Terminal
residue		 Strand sense
Strand 1
B
188 190first strand
Strand 2
B
216 221parallel
Strand 3
B
163 168parallel
Strand 4
B
242 246parallel
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